How to Solve Brake Disc Rust?
2 Answers
Car brake disc rust: Continuous braking while driving can remove rust. When the rust is severe, causing noticeable shaking in the brake pedal and steering wheel, it is necessary to take the car to a repair shop to remove the brake disc for grinding and rust removal. Below is related information about car brake disc rust: 1. Causes of rust: Brake discs are exposed to the outside and constantly come into contact with mud, rainwater on the road, and moisture in the air. If the car is not driven for a few days, the brake discs will start to rust. Even newly replaced brake discs can rust overnight in humid weather. General rust does not affect braking performance; in fact, driving the car out and applying the brakes several times can wear off the rust. 2. Commonality of rust: For most household cars, brake disc rust is a very normal phenomenon and not a standard for determining whether a car is new or not. Whether brakes are prone to rust mainly depends on the material of the brake disc, as most household cars currently use brake discs made of gray cast iron 250 standard. While they offer good braking performance, they have a high carbon content and no rust protection on the surface, making rust inevitable.
Last month, my car sat unused for several days, and after a rain, I noticed rust all over the brake discs. I was a bit worried at first. But a friend told me this is quite normal, especially in humid weather or after prolonged parking, as iron brake discs can rust easily when exposed to moisture. The solution is simple: just lightly press the brakes a few times after starting the car to wear off the surface rust. Avoid slamming the brakes right away, as this can cause skidding. Instead, drive slowly for a short distance, then gradually apply the brakes to let the pads and discs rub against each other—the rust will disappear quickly. However, if the rust is deep and you hear squeaking or experience unstable braking when driving, it’s best to visit a professional repair shop to check if the discs are corroded. To prevent this, try parking in dry areas or garages and avoid leaving your car exposed to rain whenever possible.
